Holtek HT86Bxx語音MCU控制方案

Holtek公司(盛群半导体)的 HT86Bxx是新一代語音MCU系列产品, 包括HT86B05、HT86B10、HT86B20、HT86B30、HT86B40、HT86B50、HT86B60、HT86B70、HT86B80、HT86B90，语音容量范围从36秒到1152秒，语音ROM容量由96KByte到8MByte. HT86Bxx的工作电压从2.2V到5.5V,系统时钟从4MHz到8MHz,提供各种取样频率和节拍,音调大小和节奏,用于语音合成和音调发生器. HT86Bxx还集成了高质量的12位电压型DAC输出.本文介绍了HT86Bxx系列的主要特性,方框图以及多种应用电路.

The Voice type series of MCUs are 8-bit high performance microcontrollers which include a voice synthesizer and tone generator. They are designed for applications which require multiple I/Os and sound effects, such as voice and melody. The devices can provide
various sampling rates and beats, tone levels, tempos for speech synthesizer and melody generator.
They also include an integrated high quality, voltage type DAC output. The external interrupt can be triggered with falling edges or both falling and rising edges.
The devices are excellent solutions for versatile voice and sound effect product applications with their efficient MCU instructions providing the user with programming
capability for powerful custom applications. The system frequency can be up to 8MHz at an operating voltage of 2.2V and include a power-down function to reduce power consumption.
HT86Bxx主要特性:
_ Operating voltage: 2.2V~5.5V
_ System clock: 4MHz~8MHz
_ Crystal and RC system oscillator
_ 16/20/24 I/O pins
_ 8K_16-bit Program Memory
_ 192_8/384_8-bit Data Memory
_ External interrupt input
_ Three 8-bit programmable Timers with overflow interrupt and 8-stage prescaler
_ 12-bit high quality voltage type D/A output
_ PWM circuit direct audio output
_ External RC oscillator converter
_ 8 capacitor/resistor sensor input
_ Watchdog timer function
_ 8-level subroutine nesting
_ Low voltage reset function
_ Integrated voice ROM with various capacities
_ Power-down function and wake-up feature reduce power consumption
_ Up to 0.5_s instruction cycle with 8MHz system clock at VDD= 5V
_ 63 powerful instructions



图1.HT86Bxx方框图
Selection Table
The devices include a comprehensive range of features, with most features common to all devices. The main features distinguishing them are Program Memory and Data Memory capacity, Voice ROM and Voice capacity, I/O count, stack size and package types.



应用电路





图2. HT86Bxx应用电路(1)





图3. HT86Bxx应用电路(2)







图4. HT86Bxx应用电路(3)